SEVERE MACHINE DAMAGE—Severe machine damage can result if the low speed drive
engages during or at the end of extract.
Immediately lock OFF and tag out power at the wall disconnect if any of the following occur:
☞ The machine makes a sound like skidding automobile tires as it comes out of extract;
☞ The wash or drain clutch does not disengage or prematurely engages during extract;
☞ The wash, drain, extract, or main drive belts jump off at the start of, during, or at the end
of extract;
☞ Strange sounds occur during extract.
☞ DO NOT permit the machine to operate until the cause is found and remedied.
ËHow the Centrifugal Switch Works
The centrifugal switch (used on Mark II machines) opens at speeds above drain. After E2 terminates, the
switch closes as soon as the cylinder slows sufficiently, enabling the controller to engage the wash clutch.
ÊHow the Machine Reverses
The wash/E1 motor periodically stops and reverses direction during washing and rinsing. Machines are
equipped with either single-phase or three-phase motors, each using a different method to reverse rotation. Two
relays (CRWAC and CRWAA) operate to change the cylinder direction. These relays are actuated so that only one
operates at a time. CRWAC causes clockwise rotation, CRWAA causes counterclockwise rotation.
ËCylinder Reversal for Single-Phase Machines
—Rotation of single-phase motors is selected by
changing the polarity of the start winding. Relays CRWAC and CRWAA perform this action automatically.
ËCylinder Reversal for Three-Phase Machines
—Rotation of three-phase motors is selected by ex-
changing two of three phased leads. Relays CRWAC and CRWAA automatically swap leads through a switching
process, thus changing rotational direction. There is a brief dwell period (generally less than three seconds) during
each change of direction. The cylinder is stationary during this time.
B
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